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Snap Action, Limit Switches

The application field and working principle of snap action limit switches can be broadly divided into three categories. Firstly, snap action limit switches are used to detect whether a physical mechanical movement occurs or not. Secondly, the snap action limit switches are used for controlling a specific machine process. Lastly, these switches can be used to measure a specific distance or orientation.

In general, snap action limit switches come in a wide variety of shapes and sizes to suit the needs of different applications. Generally, the devices can be mounted on the outside of a machine, or on a circuit board inside the machine, as well as sometimes directly on the machine\'s surface. In some applications, they can even be integrated into the machine itself.

The working principle of a snap action limit switch is based on the concept of contact separation. This is because the device uses a separate contact element that is connected to a base element or structure. When the contact is moved by any means, the base element is also moved in the process. This change of the contact separation triggers the switch. The switch then sends an electrical signal to the system that it is connected to.

Snap action limit switches are usually made from sturdy materials such as plastic or metal, and they can also be made from more fragile materials such as ceramic. Generally, the devices consist of an actuating lever, an electrically-conductive element, and a switch body. It also contains a contact spring, which serves to close or open the electrical circuit when actuated. Depending on the type of switch, the contact spring can be either spring-loaded or magnetised.

In terms of their operation, the snap action limit switches are typically self-actuated. This means that they activate with minimal energy and require no external force. The most common type of switch is the mechanical snap action switch, which uses a mechanism of opposing magnets. As the switch is activated, a magnet embedded in the switch lever engages the opposing magnet, causing the switch to trigger. Other types of switches use different actuating mechanisms, such as a sensor, a latch, or a lever.

With regard to their use, snap action limit switches are usually used to detect a physical change in the environment, such as the movement of an object or the opening or closing of something. In addition, the switches can be used for controlling machines and for measuring specific positions or distances. Moreover, they can also be used as safety devices to prevent overloading of machinery or electrical apparatus.

In conclusion, snap action limit switches are a versatile type of switch that has numerous applications. They can be used to detect physical movement, control a machine process, and measure distance and orientation. Furthermore, they are generally self-actuated and require no external force to activate. As such, they offer a reliable, robust, and affordable solution for a wide variety of applications.